Combined telephone and telegraph system



15 SheetsSheet 1 l coMBINED TBLEFHoNE AND TELEGRAPH SYSTEM July 27, 1954 origina1 Filed March 17. 1947 INVENToR Louls M. PoTTs, DECEASED MARTHA w. c PoTTs, EXEcuTR|X BY 44 ATToRNEY l y 1954 L. M. PoTTs 2,684,996

cOMBNED TELEPHONE AND TELEGRAPH SYSTEM original Filed March 17. 1947 15 SheetsSheet 2 59 FIG. 3 INVENTOR Louls M. PoTTS, DEcEASED MARTHA w. c. POTTS, EXEcUTRIX ATToRNEY y 1954 L. M. PoTTS 2,684,996

c0MBNBD TELEPHONE AND TELEGRAPH SYSTBM origina1 Filed March 17 194? 15 SheetS-Sheet 3 INVENTOR Louls M. PoTTs, DECEASED MARH W. c. PoTs, ExEcuTRlx ATToRNEY July 27, 1954 origina1 Filed March 17 94? L. M. POTTS CoMBNED TELEPHONE AND TELEGRAPH SYSTEM 15 SheetSSheet 4 56l FIG.l5 (DISTRIcT SELEcToR) INVENToR LOUIS M. PoTTs, DEcEASED MARTH c. PoTTs, EXEcuTRIX July 27, 1954 L. M. PoTTs coMBNE=D TELEPHONE AND TELEGRAPH SYSTEM 15 SheetsSheet 5 origina1 Fi1ed March 17. 1947 Ill FIG. 9

INVENTOR Louls M. PoTTs, DEcEASED MARTHA w. c. PoT

Ts, ExEcuTRIX y 7, 1954 L. M. PoTTs 2,684,996

coMBNBD TBLEPHONB AND TELEGRAPH SYSTEM origina1 Filed March 17. 194? 15 Shee s Sheet 6 o R s w X Y FlG. lo FIG. m

INVENToR Louls M, PoTTS, DEcEASED MARTHA W, c. PoTTs, EXEcuTRIX TORNEY July 27, 1954 L. M. PoTTs 9 coMBINED TELEPHONE AND TELEGRAPH SYSTEM h origina1 F11ed March 17 194? 15 SheetS-Sheet 7 FIG. (sUBscRER s sTAToN) |NVNToR Louls M. PoTTs, DECEAsED MARTHA w. c. PoTTs,EXEcuTRX ATToRNEY July 27, 1954 L. M. PoTTs coMBNED TELEPHONE: AND TELEGRAPH SYSTE=M origina1 Fi1ed March 17. 1947 FIG. l2 (CALL REGISTER) 15 Sheetssheet 8 ATTORNEY Juy 27, 1954 L. M, PoTTS 4,996

coMBNED TELEPHONE AND TELBGRAPH SYSTEM original Filed March 17, 1947 15 sheetsSheet 9 FIG. l3 (cALL REGISTER) 2l H... M...

...VENToR Louls M. PoTTs, DEcEAsED MARTHA w. c. PoTTs, EXEcuTRIX ATToRNEY July 27, 1954 L. M. PoTTs 2,684,996

coMBNE=D TELEPHONE= AND TELEGRAPH SYSTEM origina1 Filed March 17. 194? 15 SheetsSheet 10 FIG. ls (INcoMING sELEcToR) INVENToR Louls M. PoTTs, DEcEAsED MARTHA W. c. PoTTs,EXEcuTRIx TToRNEY July 27, 1954 L M. PoTTs cOMBNED TBLEPHONE AND TE:LEGRAPH SySTEM origina1 Fi1ed March 17. 1947 15 sheetsSheet 12 INVENTOR Louls M. PoTTs, DEcEASED MARTHA w. c. PoTTs, EXEcuTRIX BY ...4.4) ATToRNEY July 27, 1954 L M. PoTTS coMBNBD TELEPHONE AND TBLEGRAPH SySTEM 15 SheetsSheet 13 origina1 Fi1ed March 17. 1947 NvENoR Lous M. PoTTs,DEcEAsED MARTHA W .c. POTTs,ExEcuTRIX BY 3 ATTORNEY Pafenfed July 27, 1954 UNITED STATES PATENT oFFCE ooMBINED TELoPHoNE AND TELEGBAPH SYSTEM f)figinal appHoafion ffoh 17, 1947, sorial 1To. 35,186. I)ivido(f and this oppHoafion 1IofoI1 19, 199, sefial No. 82,30

6 clohns.

-,Tf1is invention felateS to coInInunication Sys ten1S and nore articulaTly to sySteIns oombin ing telephone and telegfaph operations.

This application is a division of copending ap p1ication SeTia1 No. 735,136, f11ed afch 17, 197, now Fatent No 2,557,392 granted June 19, 1951.

A pffInaTy objeot of the invention is to provide a oonbned felephone and telegfaph System Whe1'ein the oa11ing Subscribef n1oy oonInI1nfoate With an unattended subsofibef set and 1eave a pfinted recofd of his IneSSage.

coording to the pfesent invention 3 oo1ff n1unioation Systen1is provided in vvhich each te1e phone subscfibef, in place of the telephone Sub Set including a calling diaL haS a subsef in vVhich the base inoludes a telegfaph keyboard tranS 1T1itter and a type ohafactef fecofdef, The telegraph keyboafd is uSed fof Setting up the oon nectionS fof telephone service as we11 as for te1e gfaph oefvioe and thus feplaoes the dia1S. t also pfovides a leave vord Sefvioe. The Sub soribeT autoInatically pfoduces a printed fecofd of a11 outgoing calls including exohange designa tion and subScfiber,S nun1bef. The systen1 ac oofdiI g to the invention alSo inoludes a line identieT Whioh autoxnatically recofds on the ca11ing Station printer, the Station designation and subSoriber,S number of the connected station before a fnesSage can be tfanSn1itfed.

. 1`/fore Specica11y, the sllbsoribef,S unit of the pTeSent inventioI1 is intended to feplace the fesent telephone subscfibef,S unit and oofnpriseS a base Which contains the ca11 belL induotion coi1, ond te1egTa h transn1itting and reoeiving apparatus,- and has a cradle to oarr the handset, Whioh includes the telephone t anSn1itter and feoeivef. n place of the dial there is pfovided a keyboard whioh sefveS the purpose of the dia1 for controning the SWitohboafd at the oentral Station to set 11p a cirouit to the ca11edsubsofibef for telephone of telegfoph ooTnnlunication. or telephone coInInunioation the prooodure iS t11e safne as aJt the pfesent tirne exoept that when the dia1.tone is vfeceived, the keyboard iS op erated in place of the dia1.

At the centfal Station, the appafotus of the te1ephono exchange Inay be the soIne aS at pres ent, With two exoeptionS: FirSt, to'the fegiSte' oifouit thofe is added aj device vvhich registers the c311ed station deSignatioI1in a te1egr)1:)h code and tranSlateS the telegfaph oode into the fegu- 1af decna1 telephone code and registers it io that code, Which fegistration oontro1S the Svvitch boafd in the uSua1 1nanner. Secondly when telegfaph sefvioe is desired, thefe are added to the link oirouits, units Whioh in response to the operation of the keyboard at eithef oonnecte(1 subscribef,S Station Send to both subscribefS sta tions positive and negative iInptllSes, the nuInber of Which is detefmined by the key depfessed.

since Inost con11T1un icotions are telephonio, and the telegfaph appofatus Wi11 be fequired only oooasionally, the cirouits of the SyStefn accofding to the present invention pfovide only the llun1bef of telegraph fepeatefs feq11ifed by the telegfaph traio itself. ()vVevef, to pfovide the gfeateSt flexibility, the 1ink cifouits afe provided with f1ding oifcl1itS so thot aJ te1egfph fepeater oan be attached insfantly to any circuit when re quifed. If this fiexibility is saoficed and the telegraph fepeatef iS added only in feSpohSe to 34 spooial ca11 befofe connection is nlade, the Inodi ed cirouits n1ay be SiInp1e' of at least fever, but the saIne in principle as hefeinaftef shown and desofibed. When the telophone communication is used, the anSWering party is uSually feadily identied, but in unattended of leave ofk te1e gfaph Sefvice, n1eans fnust be pfovided to identify the oonnectod station before the telegran1 is Sent. flcoordingly, a line fdentier is included iI1 the sySten1 acoofding to the preSent invention.

In the eolbodin1ent hereinaftef desofibed, the tfansn1ftter is of the fevertive type. The on1y signa1 acttlally transInitted ffom the subsofibefs staition iS a start impulSe Which acts to start a transn1itter of the oentfal stotion, Which at tenlpts on each oycle of opefation to tfanSnit alternately plus and Ii1in11s iTnpulses unti1- a total of six poSitive and five nogative inlpu1Ses hove been ooIlditioflally pofn1itted. Aftef the nun1 ber of each kind of iInpulSe coffeSponding to the key depfeSSed has been tfansn1itted, the oifouit is opened of the ubStation for each kind of iIn pulSe So that, at the fonowing attefnptS, the n pulseS of that polarity vvi11 not be transInitted. No tin1ing of the ifnpulseS. iS fequifed athe sub Sofibef,S station and no speedoontfOL exoept of11y that the inlpulSes InuSt be long enough and strong enough to opefate the Inagnet and the Inech anisn1 With oeTtainty, r vZhen two subsofibers are connected, 1ike oode iInbulSes aTe tTansInitted to both StationS Sin1ulfaneously. vVhiohevef line fst depfeSSes al key SeizeS oontfol and -de tofInines the signals tranSn1itted. Baoh tfanS Initter transInits Signals in bothdifeotionS Which 1flaly be of a diffefent ohafacter in the two difec tionS fo fneet diffefent oircuit oonditionS, but sin1ilar to one anothef in the code arrangenlent of the elementary impulSes. n the feg iSter cir ouit the fepeated sign91s are used fo fegistefing 

